Burglarproof lock for window sashes



April 7, 1931. s. RUDDER BURGLARPROOF LOCK FOR WINDOW SASHES Filed Sept. 13, 1929 In verz for:

George Rude/er. 5? -4 W Ki Zor-n egs Patented Apr, 7, 1931 onirsn srarss PATENT, optics.

GEORGE RUDDER, OF CYNTHIANA, KENTUCKY, ASSIGNOR OF ONE-HALF TO HENRIETTA PAYTON, OF CINCINNATI, OI-IIO BURGLARPROOF LOOK FOR WINDOW SASI'IES Application filed September 13,1929. Serial No. 392,469.

My invention relates to btirglar proof locks for window sash and has for its object to provide a sash lock simple in construction and cheap to make, which can be applied to window sash and when so applied will be absolutely burglar-proof. That is a lock which cannot be opened by means of a knife or other implement slid between the sashes to engage a portion ofthe lock and move it.

In fact the lock which 1 have devised cannot be opened at all excepting from the inside or upon breaking of thesash.

The full objects and advantages of my invention will appear in connection with the detailed description thereof, and the novel features of my inventive idea are particularly pointed out inthe claim.

In the drawings illustrating an application of my invention in one form,

sash frame members which engage in juxtaposition when both sash are closed, showing my lock applied thereto and viewed'from above in the direction of the arrows on the line 11 of Fig. 2. Fig. 2 is a transverse section on line 2-2 of Fig. 1. Fig. 3 is a front elevation view of the lock when the same is closed from the inside, asin Fig. 1. Fig. 4 is a view of the lock hasp in position as shown on the linedl in the direction of the arrows. I i 1 The inner sash frame member 10 has applied thereto an angle iron 11 which sup ports a. pivot stud 12' protruding therethrough. Correspondingly, the sash frame.

member 13 has secured thereto face plate 14 having a portion thereof beveled inwardly as shown at 15, which inwardlybeveled portion carries a turned-over hasp 17, as clearly shown in Figs. 2, 3 and t. Mounted upon the pivot member 12 is a rocking platelG which carries a vertical semi-annular flange 18, whlch flange 1s beveled upwardly from a low point 19 to a high point 20, as best shown in Fig. 3. The vertical flange also carries a Fig. 1 is a plan view of a portion of the two rotated on the pivot pin 12, forcing the flange member 18 under and inside of the hasp 17,

with the result that the two sash members. are drawn tightly together and held firmly locked. In this position the only thing which is exposed to a knife or other implement forced betweenthe two sash members is the curved flange member 18, whieh opposes only the outer curved surface to the action of the knife or other implement. The result is that it cannot be moved and the lock is perfectly burglar-proof. The constructionwis simple, exceedingly efficient, cheap tomake and easy to apply, for all of which reasons it is highly efficient for the purpose intended. Also, the flange member 18 is not perfectly supporting pivot 12, but is slightly eccentric, with the result that the end thereof enters easily, but as the member is rotated it exered on the inside face of the lower rail of the circular with respect to the center of the upper-sash in juxtaposed relation to the vertical portion of the first-named plate and be-' ing screwed to said inside face, an inwardlyturned hasp carried by said last-named plate out of line with the meeting plane of said two sash rail faces, and an oscillating plate 7 1 carried by the horizontal portion of thelirst named plate having an upstanding, flange adapted to engage beneath said turned-over hasp. I

In testimony whereof I hereunto affixniy signature.

anon-en eunnnn.

finger piece 21 and is adapted to engage un der the hasp 17, as clearly shown in Figs. 1 and 2. In operation, when the sash members 10 and 13 are in their juxtaposed position 50 when the windows are closed, the plate 16 is 

